org.apache.hc.core5.reactor

## Interface ConnectionInitiator

- All Known Implementing Classes:
    AsyncRequester, AsyncRequester, AsyncServer, DefaultConnectingIOReactor, DefaultListeningIOReactor, H2AsyncRequester, H2MultiplexingRequester, H2TestClient, Http1TestClient, HttpAsyncRequester, HttpAsyncServer

      public interface ConnectionInitiator

  Non-blocking connection initiator.
  Since:
    5.0

- - ### Method Summary

    All Methods Instance Methods Abstract Methods
    Modifier and Type | Method and Description
    --- | ---
    `Future<IOSession>` | `connect(NamedEndpoint remoteEndpoint, SocketAddress remoteAddress, SocketAddress localAddress, Timeout timeout, Object attachment, FutureCallback<IOSession> callback)` Requests a connection to a remote host.

- - ### Method Detail

    - #### connect

          Future<IOSession> connect(NamedEndpoint remoteEndpoint,
                                    SocketAddress remoteAddress,
                                    SocketAddress localAddress,
                                    Timeout timeout,
                                    Object attachment,
                                    FutureCallback<IOSession> callback)

      Requests a connection to a remote host.

      Opening a connection to a remote host usually tends to be a time consuming process and may take a while to complete. One can monitor and control the process of session initialization by means of the `Future` interface.

      There are several parameters one can use to exert a greater control over the process of session initialization:

      A non-null local socket address parameter can be used to bind the socket to a specific local address.

      An attachment object can added to the new session's context upon initialization. This object can be used to pass an initial processing state to the protocol handler.

      It is often desirable to be able to react to the completion of a session request asynchronously without having to wait for it, blocking the current thread of execution. One can optionally provide an implementation `FutureCallback` instance to get notified of events related to session requests, such as request completion, cancellation, failure or timeout.

      Parameters:
        `remoteEndpoint` - name of the remote host.
        `remoteAddress` - remote socket address.
        `localAddress` - local socket address. Can be `null`, in which can the default local address and a random port will be used.
        `timeout` - connect timeout.
        `attachment` - the attachment object. Can be `null`.
        `callback` - interface. Can be `null`.
      Returns:
        session request object.

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